Grain-grinder.



No. 678,8l2. Patented my la, mol.. A. w. PATRICK.

GRAIN GRINDER.

- (Application led Aug. 4, 1900.) 4 A (No Model.) 2 ,Sheets-Sheet l.

uninlnfinfini "Illlllllllllllll No. 678,8l2. Patented my a6, leol. A. W. PATRICK.

GRAIN GRINDER.

(Application led Aug. 44, 1900.)

2 Sheets-Sheet 2.

(Nn Model.)

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ARCH XV. PATRICK, OF NEX/V CAMBRTA, KANSAS.

GRAlNmGRlNDER.

SPECIFTOATTQIX forming part of Letters Patent No. 678,812, dated July 16, 1901.

Application iled August 4, 1900. Serial No. 25,955. (No modell) .To all whom t may concern:

Be it known that I, ARCH W. PATRICK, a citizen of the United States of America, residing at New Cambria, in the county of Saline and State of Kansas, have invented new and useful Improvements in Grain-Grinders, of which the following isa specification.

This invention relates to new and useful improvements in grain-grinders; and its primary object is to provide a simple and durable device which is compact and cheap of manufacture.

A further object is to provide a device of this character which employs corrugated plates in lieu of rollers, as have been generally employed heretofore, and to so construct the parts as to require a minimum amount of power to operate the same.

To these ends the invention consists in providing a frame within which is secured a hopper of any desired form. A rocking beam is pivoted at a point between its ends to this frame and is provided at opposite sides of its fulcrum with downwardly-extending arms, each of which is secured to a holder of peculiar construction. Detachably secured to each holder is a corrugated grinding-plate, and arranged therebelow is a trough or other device adapted to receive the ground material after the same has been discharged from between the plates.

Motion is imparted. to the rocking beam from a crank-shaft preferably through a pitman, and this shaft is driven in any suitable manner. A belt passes over a pulley secured to the shaft and over a second pulley which is mounted within the hopper of the machine, and suitable means are employed whereby said belt may be readily tightened. The arms of the rocking beam are connected to the frame of the device by means of pitmen, as shown, and one of these pitmen is held in position bya suitably-mounted spring, whereby the pressure of the grinding-plates against each other may be readily regulated.

The invention also consists in certain features of construction and. combination of parte, which will be hereinafter more fully described and claimed, and illustrated in the accompanying drawings, showing the preferred form of my invention, and in which- Figure 1 is a side elevation of the device.

Fig.l 2 is a central transverse section. Fig. 3 is a front elevation of one of the plate-holders. Fig. L1 is a rear elevation thereof. Figs. 5 and G are detail views of the grindingplates.

Referringto the drawings by numerals of reference, 1 1 are the standards of the frame, which are connected by suitably-arranged cross-strips 2, 3, and 4. Secured between the upper cross-strips l of the frame is a hopper 5, having a valve in the bottom thereof adapted to be operated by a belt 6, which passes over a pulley 7, secured to the shaft of said valve, and over a lpulley S, which is secured to a shaft 9, journaled within the frame and which receives motion from any suitable source. A crank 10 projects from this shaft, and a pitinan 11 is pivotally secured thereto, and at its opposite end is pivoted to a rocking beam 12, which is journaled at a point 13 between its ends above the center of the hopper 5, before referred to. Arms 14, which are preferably curved,as shown, are pivoted to the beam 12 at opposite sides of its fulcrum 13, and each arm is provided at its free end with a plate-holder 15. These holders are of any desired length, and each is provided in its front face with a preferably dovetailed groove 16, and the upper portion of said front face is inclined backward, as at 17. Each of the dovetailed grooves is adapted to receive a rib 18, which is formed upon the rear face of a grinding-plate 19. This plate has longitudinally-extending corrugations 2O upon its front face and is formed of hardened steel or other suitable material which will not readily wear from friction.

Secured to one of the standards 1 is a rod 21, which may be adjusted longitudinally within said standards and which is secured in position by means of nuts 22 or any other desired manner. This rod is provided at its inner end with an eye,within which is pivoted the end of a link The opposite end of this link is pivoted to the free end of one of the holders 15. A second link 2a is pivoted to the remaining holder 15 and is secured at its opposite end to an adjustable rod 25, the threaded end 26 of which is mounted within a bracket 27, which is pivoted to one of the standards of the frame. This bracket is provided at its free end with an eye,within which IOO isslidably mounted a rod 28, also pivoted to said standard, and a spring 29 encircles said of the belt 6, and the opposite end of the rod mally out of contact with the belt.

is pivoted to the lower end of a lever 34, which is journaled upon one of the standards 1 and is provided with a pawl 35, whichis held normally in engagement with the teeth of a segment 36, which is secured to said standard. A spring 37 encircles the rod 32 and bears at opposite ends upon one of the ears 31 and upon a collar 38, secured to said rod. This spring, as is obvious, holds the collar 33 nor- When, however, said belt becomes loose upon the pulleys '7 and 8, vthe same can be readily tightened by throwing the lever 34 backward upon its fulcrum and forcing the rod 32 forward. The pawl 35 will engage the teethof the segment 3G and lock therod and lever in such position.

A trough 39 is secured to the cross-strips 2 and 3 at opposite sides of the holders 15 and extendsasuitabledistancethereabove. This trough is adapted to receive the grain after the same has been discharged from between the grinding-plates of the device. The grain is placed in the hopper 5 and is discharged therefrom by the revolution of the valve therein and will fall between the inclined faces 17 of the plate-holders l5. As the pulley 8 revolves an up-and-down or rocking movement will be imparted to the pitman 12, and it will be seen that the arms 14, which are pivoted thereto, will be raised and lowered alternately. As the lower ends of said arms are connected to the rods 21 and 25 by the links 23 and 24, respectively, it will be seen that lateral movement of the plate-holders and plates therein will be substantially prevented. As these lplates are moved in opposite directions, it is obvious that the corrugated surfaces thereof will rub upon each other and that all grain admitted therebetween will be thoroughly ground before being discharged into the trough 39. As the rod 25 has longitudinal movement, the plates 19 will always remain in contact, and by regulating the tension of the spring 29 the pressure of said plates against each other may be readily regulated.

It Will be understood that the grindingplates may be readily removed and replaced by simply detaching the sides of the trough 39 and slipping the same from and into the plate-holders 15 laterally. Where the grinding-plates and their holders are of considerable length, the holders are preferably provided upon their rear faces with ears 4O,Which 'receive a rod 41. (Shown in dotted lines in Fig. 4.) This rod serves as a pivot for one of the arms 14 as well as for two links 24, which would be arranged at the opposite ends of said holder. It is of course understood that each of these links will have adjusting mechanism similar to that of the link 24, before described. The remaining plate-holder is of course provided with two fixed rods 21 and connecting-links 23, which links are pivoted to the rod 41 of said plate-holder.

In the foregoing description I have shown the preferred form of my invention, though I do not wish to be understood as limiting myself thereto, as I am aware that modifications may be made therein without departing from the principle or sacrificing anyof the advantages of this invention, and I therefore reserve to myself the right to make such changes as fairly fall within the scope thereof.

Having thus described the invention, what is claimed, and desired to be -secured by Letters Patent, isw- 1. The combination with aframe; ofabeam journaled thereon; arms pivoted to the beam at opposite sides of its fulcrum and suspended therefrom; grinding plates pivoted to the ends of the arms; a rod secured to the frame; a toggle-link connecting said rod with one of the grinding-plates; a rod slidably mounted within the frame; a toggle-link connecting said rod and the remaining plate, said plates being adapted to swing in a vertical plane, the joints between the rods and toggle-links serving as fulcrums therefor; a spring for holding the plates normally in contact with each other; and means for imparting a rocking motion to the beam.

2. The combination with a frame; ofabeam journaled thereon; arms pivoted to the beam at opposite sides of its fulcrum; plate-holders; ears thereto; rods within said ears and engaging the free ends of the arms; grindingplates secured to the holders; a rod secured to the frame; a toggle-link connection between said rod and one of the plate-holders; a bracket pivoted to the frame; a rod secured thereto; a toggle-link connection between the rod and the remaining plate-holder; a rod pivoted to the frame and adjustable Within the bracket; a spring encircling said rod and bearing at opposite ends upon the bracket and the end of the rod respectively, thereby holding the grinding-plates normally in contact with each other; means for adjusting the tension of said spring; and means for imparting a rocking motion to the beam, thereby causing the plates to slide upon each other, the joints between the toggle-links and their rods serving as fulcrums for said plates.

In testimony whereof I affix my signature in presence of two Witnesses.

ARCH W. PATRICK. Vitnesses:

A. WILLIAMS, W. A. MURPHEY.

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